Describe the normal transitional physiology at the time of birth?

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

satellites are frequently used to make observations of the orbit on earth

other information encoded in your genes might distinguish you from the others in the group

a bird that nests only in a particular tree species.